Compare Images
Compare two images online for free — spot every difference between two versions of a photo, screenshot or design. Changed pixels are highlighted in red with a box around the changed area, a difference map shows how much changed, and a before/after slider lets you inspect it. Adjust the tolerance to ignore compression noise. Runs privately in your browser.
100% private — everything runs in your browser. Conversion happens on your device; nothing is uploaded.
Compares the two images pixel by pixel in your browser; raise the tolerance to ignore tiny compression differences. Images of different sizes are scaled to match. Nothing is uploaded.
How to compare two images
- Drop the original image on the left.
- Drop the changed image on the right.
- See the differences highlighted and the percentage changed.
- Drag the before/after slider, or download the difference image.
What you can use it for
- Check design revisions and UI changes
- Find edits in photos and documents
- Do visual regression checks on screenshots
- Spot-the-difference puzzles
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See all free image tools →Frequently asked questions
How do I find the differences between two pictures?
Drop both images in. Changed pixels turn red and a box marks the changed area. Raise the tolerance if JPEG compression causes speckles.
Do the images need to be the same size?
No — the second image is scaled to match the first, though identical sizes give the most precise result.
Is my image uploaded?
No. Both images are compared on your device.